1)4․1/5=4/5
3/7.5/2=15/14
2)1/2+1/2+1/2+1/2+1/2=5/2
2/5+2/5+2/5=2/15
2/3+2/3+2/3+2/3+2/3+2/7=14/7
3)15/14
72/12
75/42
372/459
728/312
150/1610
35/16+27/20=175/80+108/80=283/80
143/24+15/48=286/48+15/48=301/48
2765/60-105/12=2765/60-105/12=2765/60-525/60=2240/60
884/98-873/392=3536/392-873/392=2663/39
4) 25.(4/8+6/8+1/8)=5/2.11/8=55/16
6/28+15/28=21/20
84\84+77/77=924/924+924/924=1848/924
20/12+21/12+6/12+22/12=69/12
5)5.2/3=10/3
3.7/2=21/2
6)6/7+6/7+6/7+6/7=24/7
8/3+8/3+8/3+8/3+8/3=40/3
4/9+4/9+4/9+4/9+4/9=20/9
7)35/36